TB 9-6625-2211-24
(13) Using oscilloscope time base controls and timing markers on Channel 2,
measure pulse width. If pulse width is not 0.15 0.05 Ps, perform b (1) below.
(14) Set REPLIES REPLY WIDTH SELECT switch to the first setting listed in
table 11. Repeat technique of (13) above. Pulse width will be within limits specified. If not
perform adjustment specified.
(15) Repeat technique of (14) above for remaining REPLIES REPLY WIDTH
SELECT switch settings listed in table 11. Pulse width will be within limits specified. If
not perform adjustment specified.
Table 11. Replies Reply Pulse Width
REPLIES REPLY
Pulse Width
WIDTH SELECT
Adjustments
(Ps)
switch settings
b(2)
0.45
0.45
r0.05
b(3)
0.50
0.50
r0.05
b(4)
0.90
0.90
r0.05
(16) Set REPLIES REPLY WIDTH SELECT switch to VARY. While observing
pulse width indication on oscilloscope, rotate REPLIES REPLY WIDTH VARY control
from fully ccw to fully cw. The pulse width will vary from <0.15 to >1.50 Ps.
(17) Set REPLIES SIF REPLY CODE switches to 7700.
(18) Set REPLIES M4 JAMMING switch to 1. Three jamming pulses will be
present on oscilloscope display approximately 60 Ps ahead of reply pulses.
(19) Set REPLIES M4 JAMMING switch to 2. Six jamming pulses will be present
on oscilloscope display.
(20) Set REPLIES M4 JAMMING switch to 3, 4, and 5 respectively.
The
oscilloscope will display 9, 12, and 15 jamming pulses respectively.
b. Adjustments
(1) Adjust A9R22 (fig. 1) for a pulse width of 0.15 Ps (R).
(2) Adjust A9R23 (fig. 1) for a pulse width of 0.45 Ps (R).
(3) Adjust A9R25 (fig. 1) for a pulse width of 0.50 Ps (R).
(4) Adjust A9R27 (fig. 1) for a pulse width of 0.90 Ps (R).
21 CHANGE 1
